Privacy

Last updated September 30, 2026 (added iCloud sync between your devices)

In short: Thumb Through collects nothing. It has no account and no servers of its own, and your photos never leave the places you keep them. The little it remembers (your place in each folder and your ✓ marks) can sync between your own devices through your own iCloud.

Your photos

Thumb Through only opens folders you choose in the Files picker, and only while you use it. It reads the photos in that folder to show them to you. When you delete a photo it goes to Recently Deleted in the Files app, or, where the location has none (Dropbox, for one), it is deleted from that location, whose own website may keep it for a while. When you keep a photo it stays where it is, or moves to a folder you chose. Nothing is copied, uploaded or sent anywhere.

What the app remembers, on your device

So it can pick up where you left off, Thumb Through saves a few things in its own storage on your iPhone or iPad:

the folders you opened recently, as a permission to reopen them,
the photo you were on in each folder,
which photos you marked as kept, and the history of what you deleted and kept,
your settings, such as the sort order.

For folders in cloud storage (Dropbox, iCloud Drive and the like), your place, your ✓ Kept marks, a list of which photos were in the folder at your last visit (by file size and date, not the pictures), and your recent folders' names are also saved to your own iCloud account, using Apple's iCloud key-value storage, so your other devices signed in to the same account can pick up where you left off. That data goes to Apple under your iCloud account, never to us; we cannot see it. History stays on the device. Deleting the app deletes what it stored on the device.

Network, analytics and tracking

The app makes no network requests of its own. The only thing that travels is the iCloud sync above, which Apple's system handles on your behalf. The app contains no analytics or crash-reporting software, shows no ads, and does not track you.

Children

The app collects no information from anyone, including children.

Changes